作者:Tadashi Masamune、Shingo Sato、Atsushi Abiko、Mitsunori Ono、Akio Murai
DOI:10.1246/bcsj.53.2895
日期:1980.10
factors for oxetane formation by intramolecular cyclization, were prepared and treated with base under aqueous (KOH in 75% aq DMSO) and anhydrous conditions (NaH in THF). The result of the reactions of cis- and trans-4,5-epoxy-2-rnethyl-2-undecanols, coupled with that of 1-(2,3-epoxybutyl)- and 1-(2,3-epoxy-3-methylbutyl)-1-cyclohexanols (1a and 1b), indicated that the regioselective oxetane formations
许多 3,4-环氧醇,涉及通过分子内环化形成氧杂环丁烷的关键结构因素,在水溶液(KOH 在 75% DMSO 水溶液中)和无水条件(在 THF 中的 NaH)下用碱处理。顺-和反-4,5-环氧-2-甲基-2-十一醇与1-(2,3-环氧丁基)-和1-(2,3-环氧-3)反应的结果-甲基丁基)-1-环己醇(1a 和 1b)表明,与与碳负离子的相应反应相比,具有醇盐阴离子的 3,4-环氧醇的区域选择性氧杂环丁烷形成对受攻击的环氧乙烷环的位阻非常不敏感,而1-(2,3-环氧丙基)-1-环烷醇的反应表明相关反应取决于攻击醇盐阴离子的体积。此外,1-(1,